OTHER CONTINGENCIES, GUARANTEES AND COMMITMENTS - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2026	Jun. 30, 2025
Loss Contingencies [Line Items]
Liability for aggregate future remediation costs	$ 28	$ 27
Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration]	Accounts payable and accrued liabilities, Other Liabilities, Noncurrent	Accounts payable and accrued liabilities, Other Liabilities, Noncurrent
Letter of credit	$ 22
Letter of credit, amount outstanding	0	$ 0
Alameda County, California Matter
Loss Contingencies [Line Items]
Liability for aggregate future remediation costs	$ 12	12
Remediation period (in years)	30 years
Maximum undiscounted costs	$ 28
Dickinson County, Michigan Matter
Loss Contingencies [Line Items]
Liability for aggregate future remediation costs	$ 10	10
Remediation period (in years)	30 years
Percentage of liability for aggregate remediation and associated costs, other than legal fees	24.30%
Letter of credit		$ 18